OK, I knew I should have booked my tickets prior to the 20th...

So now when I have selected a departure date, it asks which flight for the outbound leg.

Once I've selected a flight, I get the menu for the three Economy options, Lite, Regular and Flexi.

I have to do the same thing on the return leg?

So in theory, I can have the outbound leg as a Flexi and get 100% of the miles for that leg but on the return flight, be regular Economy (because the Flexi flight option adds on a lot more money) I will get 75% or even 50%?